[PATCH] powerpc: Kdump header cleanup

We need to know the base address of the kdump kernel even when we're not a
kdump kernel, so add a #define for it. Move the logic that sets the kdump
kernelbase into kdump.h instead of page.h.

Rename kdump_setup() to setup_kdump_trampoline() to make it clearer what it's
doing, and add an empty definition for the !CRASH_DUMP case to avoid a

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

3 files changed, 10 insertions, 9 deletions

diff --git a/arch/powerpc/kernel/crash_dump.c b/arch/powerpc/kernel/crash_dump.c
index 764d07329716..371973be8d71 100644
--- a/arch/powerpc/kernel/crash_dump.c
+++ b/arch/powerpc/kernel/crash_dump.c
@@ -25,6 +25,11 @@
 #define DBG(fmt...)
 #endif
 
+void reserve_kdump_trampoline(void)
+{
+	lmb_reserve(0, KDUMP_RESERVE_LIMIT);
+}
+
 static void __init create_trampoline(unsigned long addr)
 {
 	/* The maximum range of a single instruction branch, is the current
@@ -39,11 +44,11 @@ static void __init create_trampoline(unsigned long addr)
 	create_branch(addr + 4, addr + PHYSICAL_START, 0);
 }
 
-void __init kdump_setup(void)
+void __init setup_kdump_trampoline(void)
 {
 	unsigned long i;
 
-	DBG(" -> kdump_setup()\n");
+	DBG(" -> setup_kdump_trampoline()\n");
 
 	for (i = KDUMP_TRAMPOLINE_START; i < KDUMP_TRAMPOLINE_END; i += 8) {
 		create_trampoline(i);
@@ -52,7 +57,7 @@ void __init kdump_setup(void)
 	create_trampoline(__pa(system_reset_fwnmi) - PHYSICAL_START);
 	create_trampoline(__pa(machine_check_fwnmi) - PHYSICAL_START);
 
-	DBG(" <- kdump_setup()\n");
+	DBG(" <- setup_kdump_trampoline()\n");
 }
 
 #ifdef CONFIG_PROC_VMCORE
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index a04f726d3bab..2498afeef291 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -1326,9 +1326,7 @@ void __init early_init_devtree(void *params)
 
 	/* Reserve LMB regions used by kernel, initrd, dt, etc... */
 	lmb_reserve(PHYSICAL_START, __pa(klimit) - PHYSICAL_START);
-#ifdef CONFIG_CRASH_DUMP
-	lmb_reserve(0, KDUMP_RESERVE_LIMIT);
-#endif
+	reserve_kdump_trampoline();
 	early_reserve_mem();
 
 	lmb_enforce_memory_limit(memory_limit);
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 59773d9044ba..78f3a5fd43f6 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -193,9 +193,7 @@ void __init early_setup(unsigned long dt_ptr)
 	/* Probe the machine type */
 	probe_machine();
 
-#ifdef CONFIG_CRASH_DUMP
-	kdump_setup();
-#endif
+	setup_kdump_trampoline();
 
 	DBG("Found, Initializing memory management...\n");